Question

Bantuin dongg nyelesain sistem persamaan linear tiga variabel ini:
x+y+z = 45
x-y = -4
x-z = -17

Answer 1

X+y+z = 45
x-y = -4 -> x = y-4
x-z = -17 -> x = z-17

x+y+z = 45
y-4 +y+z = 45
2y+ z = 49

x+y+z = 45
z-17 +y+z = 45
y+2z = 62

(2y+z = 49) - (2y+4z= 124)
-3z = -75
z = 25

x-z = -17
x = 8

x+y+z = 45
8+y+25 = 45
y = 12